Rubber covered roll



July 27; 1965 H. c. MORROW 3,196,701

RUBBER COVERED ROLL Filed Oct. 10, 1963 l/VVEN TOR. HA RR Y C. MORROWAttorney United States Patent Office 3,196,701 Fatented July 27, 19653,196,701 RUBBER COVERED ROLL Harry C. Morrow, Bethel Park, Pa.,assignor to United States Steel Corporation, a corporation of New JerseyFiled Oct. 10, 1963, Ser. No. 315,278 7 Claims. (Cl. 74-2305) Thisinvention relates to a rubber covered roll and particularly to a slottedcentering roll such as shown in Lorig Patent No. 2,592,581 dated April15, 1952. Rubber covered rolls are often used in belted conveyingsystems and in other locations where it may be very difficult andexpensive to remove the rolls and ship them to a rubber company forrecovering. Also, it is expensive to stock spare rolls.

It is therefore an object of my invention to provide a rubber coveredroll in which the rubber covering can be readily removed and replacedwithout the necessity of shipping it to a rubber company.

This and other objects will be more apparent after referring to thefollowing specification and attached drawings, in which:

FIGURE 1 is a cross sectional view of the roll of my invention;

FIGURE 2 is an enlarged view, partly in section, of a portion of theroll of FIGURE 1;

FIGURE 3 is an elevation of the roll of FIGURE 1;

FIGURE 4 is a transverse fragmentary sectional view of the roll ofFIGURE 1 on an enlarged scale; and

FIGURE 5 is a transverse sectional view showing a step in themanufacture of the roll.

Referring more particularly to the drawings, reference numeral 4indicates a roll shell. A rubber covering 6 is provided over the shell 4and as shown has a uniform outer diameter. However, the center part ofthe roll may have a greater diameter than its ends. A plurality of slots8 and 10 are provided in the covering 6, the slots 8 being slanted inthe opposite direction from the slots 10. In each case the slots extendfrom the surface of the roll toward its axis away from the transversecenter of the roll in the same manner as the slots of the roll of theLorig patent mentioned above. The slots 8 and 10 are preferably widerthan the slots normally provided and the bottom of the slots areparallel to the axis of the roll. The rubber covering 6 has a lap joint12 therein extending at an angle transversely across the roll. Thearrangement of the joint 12 is preferably as shown in FIGURE 4 where thearrow indicates the direction of rotation of the roll. Suitable bondingmaterial, not shown, secures the rubber covering 6 to the roll shell 4and also secures the ends of the rubber covering together at the joint12. A band 14 preferably made of steel extends around the periphery ofthe roll within at least some of the slots 8 and 10. The band 14 bearsagainst the bottom of its associated slot and a hole 16 is preferablyprovided at each end of the band in alignment with a hole 18 through therubber covering 4. A screw 19 extends through the holes 16 and 18 andthrough a hole 20 in the steel shell 4 so as to provide additionalprotection against the covering slipping on the shell. Other fastenerssuch as bolts and studs may be used in place of the screw 19 and theterm screw as used in the claims is intended to include such otherfastening devices. If desired the ends of the band may be securedtogether with a strap binder of a usual type and the screws omitted.

In making the roll of my invention I provide a mandrel 22 having thesame diameter as the shell 4 and a length at least as great as the shell4. A rubber covering 24 is placed around the mandrel 22 to the desiredthickness and the rubber vulcanized, after which the surface of therubber is machined to the desired contour. The peripheral solts 8 and 10are then provided in the rubber to a depth less than the thickness ofthe rubber. The steps so far described are those used in covering a rollshell when it is shipped to the rubber manufacturer. The mandrel 22 maybe coated with an adhesive which will permit ready removal of thefinished rubber covering after it has been vulcanized and machined. Aslit 26 is then cut into the rubber across the full length thereofpreferably at an angle of about 15. The rubber covering is then shippedto the customer who removes the old covering from its steel shell andplaces the new covering around the shell 4. A bonding material such asrubber cement is applied to the shell 4 and/ or inner surface of thecovering 6 and also to the ends of the covering formed by the slit 26.The steel bands 14 are then applied and the roll is ready for operation.

While one embodiment of my invention has been shown and described itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claims.

I claim:

1. A rotatable roll for controlling movement of elongated objectspassing thereover comprising a metal shell, a preformed rubber coveringsurrounding the metal shell, said covering having spaced apartperipheral slots therein, said covering having a lap joint thereinextending at an angle transversely across the roll, and means forfastening said covering to said shell.

2. A rotatable roll according to claim 1 in which the slots extend fromthe surface of the roll toward the axis of the roll away from thetransverse center of the roll.

3. A rotatable roll for controlling movement of elongated objectspassing thereover comprising a metal shell, a preformed rubber coveringsurrounding said metal shell, said covering having spaced apartperipheral slots therein, and a peripheral band in at least some of saidslots bearing against the bottom thereof.

4. A rotatable roll according to claim 3 in which the slots extend fromthe surface of the roll toward the axis of the roll away from thetransverse center of the roll.

5. A rotatable roll according to claim 3 including a fastener extendingthrough said band and said covering into said shell.

6. A rotatable roll for controlling movement of elongated objectspassing thereover comprising a metal shell, a preformed rubber coveringsurrounding said metal shell, said covering having spaced apartperipheral slots therein, said covering having a lap joint thereinextending at an angle transversely across the roll, a peripheral band inat least some of said slots bearing against the bottom thereof, afastener extending through said band and said covering into .said shell,and means bonding said covering to said shell.

7. A rotatable roll according to claim 6 in which the slots extend fromthe surface of the roll toward the axis of the roll away from thetransverse center of the roll.

References Cited by the Examiner UNITED STATES PATENTS 1,074,590 9/13Kempshall L 29-148.4 2,546,200 3/51 Snavely 74-230.'7 2,592,581 4/52Lorig.

2,704,393 3/ 55 Swanson 29148.4 2,707,403 5/55 Thomson et a1 74230.72,772,879 12/ 5 6 Lorig 74241 X DON A. WAITE, Primary Examiner.

1. A ROTATABLE ROLL FOR CONTROLLING MOVEMENT OF ELONGATED OBJECTSPASSING THEREOVER COMPRISING A METAL SHELL, A PREFORMED RUBBER COVERINGSURROUNDING THE METAL SHELL, SAID COVERING HAVING SPACED APARTPERIPHERAL SLOTS THEREIN, SAID COVERING HAVING A LAP JOINT THEREINEXTENDING AT AN ANGLE TRANSVERSELY ACROSS THE ROLL, AND MEANS FORFASTENING SAID COVERING TO SAID SHELL.